I love knit picks! I'm scared to even think how much of salary they get. I've used shine and shine worsted and they are both great yarns. I've got some simple stripes to use but I think they are discontinuing that line. Andean Silk and Andean Treasure are two my favorites.
I've been ordering a lot of their color cards here recently and they have nice color selections. The yarn colors seem to be complimentary to the other colors for that yarn, which makes it much easier to design a color scheme.
I'm not crazy about their shipping but for the prices I can suck it up.